NSA whistleblower Edward Snowden has been blamed by the CIA for making it easier for the ISIS masterminds behind the Paris terror strikes to plan their atrocities that killed at least 132 people under the radar.

Related articles

He has hurt this country and has helped our enemies. ISIS has clearly gone to school on what they need to do in order to keep their activities concealed from the authorities.

John Brennan, US CIA

It has previously been reported that ISIS IT experts studied Snowden's leaks to help avoid detection to develop encrypted channels of communication.

Mr Brennan said: “In the past several years, because of a number of unauthorised disclosures and a lot of handwringing over the government’s role in the effort to try to uncover these terrorists, there have been some policy and legal and other actions that make our ability collectively, internationally to find these terrorists much more challenging.

"I do hope that this is going to be a wake-up call particularly in areas of Europe where I think there has been a misrepresentation of what the intelligence security services are doing by some quarters that are designed to undercut those capabilities.